Are you on Mac or Windows? Do you have VLC installed or not? On my Windows 7 installation h264 is default inside the mp4 preset. Its the most common codec and allows to encode videos nearly lossless with higher quality values. So yeah, it would be the best option for you.

If you are on a Mac, I can't help you. But others will, that's for sure. If you are in Windows, you probably have to install a newer version of ffmpeg. But first we need to know more about your problem.

Okay, that's an important information because I never had this problem. It could be because I already had VLC installed or it could be because I already had the full ffmpeg installed and not only the spartan Reaper ffmpeg.

So now I need to know if one of you has VLC already installed and still doesn't get h264. If yes, both of you should download the newest full ffmeg. Instructions will follow if we have sorted it out.

Clean system here, no VLC player, FFMPEG or other codec packs installed. Using exclusively portable applications only, including Reaper.

I have no problem with unavailibility of the codecs in Reaper. I just wanted to make it clear that h264 is not available by default in Reaper. Most of users here have VLC or codecs installed in system so it can lead to confusion when sorting such questions about codecs in clean Reaper.

Are you on Mac or Windows? Do you have VLC installed or not? On my Windows 7 installation h264 is default inside the mp4 preset. Its the most common codec and allows to encode videos nearly lossless with higher quality values. So yeah, it would be the best option for you.

If you are on a Mac, I can't help you. But others will, that's for sure. If you are in Windows, you probably have to install a newer version of ffmpeg. But first we need to know more about your problem.

I am running Windows 10. I have not installed VLC whatever that is. Where do I get a newer version of ffmpeg and how/where do I install it? Thanks in advance.